Table 2-7 DDR4 memory specications
Parameter Specications
Maximum capacity per DDR4 DIMM (GB) 128
Rated speed (MT/s) 2933
Operating voltage (V) 1.2
Maximum number of DDR4 DIMMs in a server
a
24
Maximum DDR4 memory capacity of the server
(GB)
b
3072
Maximum operating
speed (MT/s)
1DPC
c
2933
d
2DPC 2666
● a: The maximum number of DDR4 DIMMs is based on dual-processor
conguration. The value is halved for a server with only one processor.
● b: The maximum DDR4 memory capacity varies depending on the processor
type. The value listed in this table is based on the assumption that DIMMs
are fully congured.
● c: DPC (DIMM per channel) indicates the number of DIMMs per channel.
● d: If the Cascade Lake processor is used, the maximum operating speed of a
DIMM can reach 2933 MT/s. If the Skylake processor is used, the maximum
operating speed of a DIMM can reach 2666 MT/s only.
2.4.4 Memory Installation Guidelines
● Observe the following when
conguring DDR4 DIMMs:
– Install DIMMs only when corresponding processors are installed.
– Do not install LRDIMMs and RDIMMs in the same server.
– Install
ller DIMMs in vacant slots.
● Observe the following when
conguring DDR4 DIMMs in specic operating
mode:
– Memory sparing mode
▪ Comply with the general installation guidelines.
▪ Each memory channel must have a valid online spare conguration.
▪ The channels can have dierent online spare congurations.
▪ Each populated channel must have a spare rank.
– Memory mirroring mode
▪ Comply with the general installation guidelines.
▪ Each processor supports two integrated memory controllers (IMCs).
At least two channels of each IMC are used for installing DIMMs
FusionServer Pro 1288H V5 Server
User Guide 2 Hardware Description
Issue 13 (2020-06-05) Copyright © Huawei Technologies Co., Ltd. 22
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